why is my pressure washer losing pressure

If you’re asking yourself, “why is my pressure washer losing pressure? Don’t worry, we’ve got answers to your question! In this blog post, we’ll explain the common causes behind why my pressure washer is losing its power. From clogged nozzles to worn out seals and blocked filters – whatever might be causing your problem, we have tips on how to fix it! So don’t throw away that powerful machine just yet – read on for more information about what could be wrong with my trusty old friend: The Pressure Washer.

Table of Contents:

What Causes Pressure Washer Loss of Pressure?

Pressure washers are a great tool for cleaning your home and garden. However, they can sometimes suffer from loss of pressure. This can be caused by several different factors, so it’s important to understand what could be causing the issue before you start troubleshooting.

Clogged Nozzles

Clogged nozzles are one of the most common causes of pressure washer loss of pressure. This is because a clog in the nozzle can reduce or block water flow, resulting in reduced pressure from the machine. To identify if your nozzle is clogged, you should look for signs such as decreased water flow and/or an uneven spray pattern coming out of the nozzle. If you notice any of these symptoms, it’s likely that your nozzle has become blocked with dirt or debris.

Fortunately, cleaning a clogged nozzle isn’t too difficult and can be done quickly with some basic tools. First, remove the affected nozzle from its housing and use a small brush to clear away any visible dirt or debris that may have built up inside it. You may also need to soak the affected area in warm soapy water before brushing it again to ensure all residue has been removed. Once cleaned, reattach the nozzle back into its housing and test it by running some water through it – if there’s still no improvement then you’ll need to replace your existing unit with a new one instead.

Clogged nozzles can be easily fixed by cleaning them out with a brush or other tool. However, if this doesn’t fix the issue, then it may be time to look at worn out seals as the next possible cause of your pressure washer’s loss of pressure.

Key Takeaway: A clogged nozzle is a common cause of pressure washer loss of pressure and can be easily fixed by: 1. Removing the affected nozzle from its housing 2. Cleaning it with a brush or warm soapy water 3. Reattaching it back into its housing and testing for improved performance

Worn Out Seals

Worn out seals are one of the most common causes of pressure washer loss of pressure. The seals on a pressure washer help to keep water and air from escaping, allowing it to build up enough force to clean effectively. When these seals become worn or damaged, they can no longer do their job properly, resulting in a decrease in the amount of power your machine is able to generate.

Identifying worn out seals isn’t always easy; however, there are some tell-tale signs that you should look for when inspecting your machine:

Look for cracks or tears in the rubber seal material – this indicates that it’s been stretched beyond its limits and needs replacing.

Check for any visible signs of wear and tear – if you see any discolouration or fraying around the edges then this could be an indication that the seal has seen better days.

Listen closely for any hissing noises coming from around the seal area – this could indicate that air is leaking out due to a faulty seal.

If you find any evidence of damage then it’s time to replace your old seals with new ones. Replacing them yourself is relatively straightforward; all you need is a set of replacement O-rings (which can usually be found at hardware stores) and some basic tools such as pliers and screwdrivers. Simply remove the old O-ring by unscrewing it from its housing, then insert the new one into place before tightening everything back up again securely. Once done, test your machine out again to make sure everything works correctly.

In conclusion, worn out seals are one potential cause behind why your pressure washer may have lost power over time. Thankfully, they’re easy enough to identify and replace yourself without needing professional assistance.

Now let’s take a look at blocked filters as another potential cause of low water pressure.

Key Takeaway: Worn out seals are a common cause of pressure washer loss of power and can be identified through cracks, tears, discolouration or fraying. They’re easy to replace yourself with new O-rings and basic tools.

Blocked Filters

Blocked filters are one of the most common causes of pressure washer loss of pressure. When a filter becomes blocked, it restricts the flow of water and prevents it from reaching its full potential. This can cause a noticeable decrease in performance, as well as an increase in noise levels.

dirty filter

Identifying a blocked filter is relatively easy; if your pressure washer has suddenly become much less powerful than usual, then chances are that you have a blocked filter on your hands. To confirm this suspicion, simply remove the filter and inspect it for any signs of blockage or debris buildup. If there’s anything blocking the filter, then you’ll need to clean it out before continuing with use.

Cleaning out a blocked filter is fairly straightforward; all you need to do is take some warm soapy water and gently scrub away at any dirt or debris that may be clogging up the system. You should also check for any signs of wear or tear – if there are any holes present in the mesh material then these will need to be patched up before re-installing the filter back into place. Once everything looks good to go again, just put everything back together and fire up your pressure washer once more.

It is important to remember that regular maintenance is key when dealing with filters; they should always be checked regularly for signs of blockage or damage in order to ensure optimal performance from your machine over time.

FAQs in Relation to Why is My Pressure Washer Losing Pressure

What causes a pressure washer to lose its pressure?

a machine with slow flow

A pressure washer can lose its pressure due to a variety of reasons. The most common cause is a clogged nozzle or filter, which restricts the flow of water and reduces the pressure output. Another potential cause is an air leak in the hose or wand, which allows air to enter and reduce the overall water pressure. Finally, if there are any kinks in the hose, this can also restrict water flow and lead to decreased pressure levels. Regular maintenance such as cleaning nozzles and filters regularly should help prevent these issues from occurring.

Why does my pressure washer have intermittent pressure?

Pressure washers can experience intermittent pressure due to a variety of causes. The most common is an air leak in the hose or connections, which can cause a loss of pressure when the pump is running. Other possible causes include clogged nozzles, blocked filters, worn seals and valves, and insufficient water supply. To troubleshoot this issue, check all hoses for leaks or blockages; inspect all nozzle tips for debris; clean or replace any clogged filters; and ensure that your water source has sufficient flow rate and pressure. If none of these solutions work, contact a professional service technician for further assistance.

Do pressure washers lose pressure with long hoses?

Yes, pressure washers do lose pressure with long hoses. This is because the longer the hose, the more friction it creates which reduces water flow and therefore lowers pressure. To get around this issue, you can use a higher powered machine or opt for shorter hoses that don’t reduce the power of your washer as much. Additionally, using a hose reel to store your hose when not in use will help keep it from kinking and further reducing water flow.


In conclusion, the question, “Why is my pressure washer losing pressure?” unlocked multiple factors that are needed to be considered. If you’re experiencing a loss of pressure in your pressure washer, it’s likely due to one of the four common causes we discussed. Clogged nozzles, worn out seals, blocked filters and incorrect settings can all lead to a decrease in performance from your machine. Taking the time to troubleshoot these issues can save you time and money down the road when it comes to my pressure washer losing pressure. With a little bit of effort and some simple maintenance tasks, you’ll be back up and running with full power soon!

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